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Sergeant Major Robert K. Williamson
Sergeant Major
Headquarters & Service Battalion

The Sergeant Major of the Headquarters and Service Battalion is
Sergeant Major Robert K. Williamson.

Sergeant Major Williamson was born in New Orleans, LA and enlisted in the Marine Corps in July 1991.  Upon completion of Recruit Training, he was meritoriously promoted to Private First Class, completed Artillery Fire Direction Controlman’s Course in Fort Sill, OK, and was assigned to 11th Marine Regiment at Camp Pendleton, CA.  LCpl Williamson was meritoriously promoted to the rank of Corporal and later deployed with Battery F, 2d Battalion, 11th Marines with Battalion Landing Team 1/4, 15th Marine Expeditionary Unit aboard the USS Rushmore.  Upon returning, Cpl Williamson received orders to attend Marine Security Guard School in February 1995, graduated and was assigned to American Embassy Brazzaville, Congo.  In July 1996, Sergeant Williamson was assigned to American Embassy Buenos Aires, Argentina and was subsequently meritoriously promoted to the rank of Staff Sergeant in July 1997.  In September 1997, Staff Sergeant Williamson served as an Assistant Instructor at the Marine Security Guard School in Quantico, VA. 

In January 1998, Staff Sergeant Williamson reported for duty as the Operations Chief and Headquarters Platoon Sergeant for Battery I, 3d Battalion, 11th Marines in Twenty-nine Palms, CA and later deployed to Okinawa and Camp Fuji, Japan.  In August 1999, Staff Sergeant Williamson was selected to the rank of Gunnery Sergeant and was assigned as the 81mm Mortar Platoon Sergeant with 3d Battalion, 7th Marines in Twenty-nine Palms, CA.  While assigned to the 81mm mortar platoon, Gunnery Sergeant Williamson served as an instructor with a U.S.-led Mobile Training Team to Skopje, Macedonia in May 2000, deployed to Okinawa, Japan, and later served as the Heavy Weapons Platoon Commander while aboard the USS Rushmore in support of Landing Force CARAT throughout Southeast Asia. 

In September 2001, Gunnery Sergeant Williamson received orders to attend Marine Security Guard School and upon graduating, was assigned as the Detachment Commander at American Embassy San Jose, Costa Rica.  In April 2003, Gunnery Sergeant Williamson was selected to the rank of First Sergeant and in July 2003, was assigned as the Company First Sergeant to the Military Police/Nuclear, Biological, and Chemical Instruction Company, Marine Corps Detachment, Fort Leonard Wood, MO.   

In June 2006, 1stSgt Williamson was assigned to Headquarters Company, 8th Marines, Camp Lejeune, NC and in October 2006, deployed to Company F, 2d Battalion, 8th Marines in Fallujah, Iraq and again in October 2007 to Ramadi, Iraq in support of Operation IRAQI FREEDOM.  In January 2008, he was promoted to the rank of Sergeant Major and was assigned as the Squadron Sergeant Major for Marine Wing Support Squadron 272 from February 2008 to August 2010, serving in Al Taqaddum, Iraq and New River, NC.  He served as the Battalion Sergeant Major for 2d Light Armored Reconnaissance Battalion from October 2010 to March 2012 and deployed to the Southern Helmand River Valley in support of Operation ENDURING FREEDOM in 2011.  He assumed his current post as the Headquarters and Service Battalion Sergeant Major in April 2012.

Sergeant Major Williamson’s personal decorations include the Bronze Star Medal, Meritorious Service Medal, Navy and Marine Corps Commendation Medal, Navy and Marine Corps Achievement Medal, Army Achievement Medal, and the Combat Action Ribbon.

Leaders of MCRD Parris Island/ERR
Commanding General
Chief of Staff
Depot Sergeant Major
 
Recruit Training Regiment
Commanding Officer
Sergeant Major
 
Weapons & Field Training Battalion
Commanding Officer
Sergeant Major
 
Headquarters & Service Battalion
Commanding Officer
Sergeant Major
 
 
 
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